<template>
  <div class="login-container">
    <van-nav-bar
      class="nav-title"
      title="登录"
    >
      <i
        slot="left"
        class="toutiao toutiao-guanbi"
        @click="$router.back()"
      ></i>
    </van-nav-bar>
    <van-form
      ref="loginForm"
      @submit="onSubmit"
    >
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i
          slot="left-icon"
          class="toutiao toutiao-shouji"
        ></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i
          slot="left-icon"
          class="toutiao toutiao-yanzhengma"
        ></i>
        <template #button>
          <van-count-down
            v-if="isCountDownShow"
            slot="button"
            :time="1000 * 60"
            format="mm : ss"
            @finish="isCountDownShow = false"
          />
          <van-button
            round
            native-type="button"
            class="send-btn"
            size="small"
            type="default"
            @click="sendFn"
            v-else
          >发送验证码</van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button
          block
          type="info"
          native-type="submit"
          class="login-btn"
        >
          登录
        </van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, getSmsCode } from '@/api/user.js'
export default {
  name: 'LoginIndex',
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8|9]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false
    }
  },
  methods: {
    async onSubmit () {
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true,
        duration: 0
      })
      try {
        const res = await login(this.user)
        // console.log(res)
        this.$store.commit('setUser', res.data.data)
        this.$toast.success('登录成功')

        // 登录成功，返回上个页面
        document.location.reload()
        this.$router.back()
      } catch (err) {
        if (err.response && err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败，请稍后重试')
        }
      }
    },
    async sendFn () {
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err.message)
      }
      this.isCountDownShow = true
      // 3. 请求发送验证码
      try {
        await getSmsCode(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.response && err.response.status === 429) {
          this.$toast('发送太频繁了，请稍后重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-btn {
    width: 152px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    color: #666;
    .van-button__text {
      font-size: 22px;
      white-space: nowrap;
    }
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
  .nav-title {
    .toutiao {
      font-size: 20px;
      color: #fff;
    }
  }
}
</style>
